Reinforcing-frame.



G. M. GRAHAM.

- RBIN'RGING FRAME. AFPLIOATION FILED AUG. 11, 1910..

1,013,009. vIateni-,mi Dec. 26, 1911.

UNITED sTATEs PATENT oEEioE.

GEORGE M. GRAHAM, 0F CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO SUSPENSION STEEL CONCRETE COMPANY, A CORPORATION OF DELAWARE.

REINFORCING-FRAME.

Specification of Letters Patent.

Application filed August 11, 1910.

Patented Dec. 26, 1911.

Serial No. 576,765.

To all whom l#may concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Reinforcing-Frames, of which the following is a specification.

This invention relates to the connecting means between the columns and girders of the tubular reinforcing frame of concrete yso structures, and more especially to the special connections which form the subject matter of my companion application for Letters Patent, Serial Number 576,764, filed August 11, 1910, and the present improvement has for its object to provide a simple and eflicient provision in connection with the aforesaid connecting means whereby the tension members of a truss formation are anchored to the connections in a strong, convenient and economical manner, all as will hereinafter more fully appear.

In the accompanying drawings: Figure 1, is a detail horizontal sectional elevation on line m-m, Fig. 3 of a portion of a reinforcing frame having the present invention applied. Fig. 2, is a horizontal section of the same on line -w, Fig. 3. Fig. 3, is a sectional elevation of the same on line a02- m2, Fi l.

Similar numerals of reference indicate like parts in the different views.

Referring to the drawings, l represents portions of the vertical tubular posts or columns, and 2 portions of the tubular girders or beams, which are connected together at their points of intersection, and by means hereinafter described, to constitute assembled portions of the reinforcing'frame of a concrete structure.

The connecting means above referred to forms the subject matter of my aforesaid companion application, Serial No. 576,764 and comprises construction as follows 3 are a series of segmental staves formed by longitudinal slits made in the end portions of the respective girders 2, and which are bent at an angle to the body portion of the girder to constitute angle attaching or splice members, which in turn are formed with bolt holes for the passage of the attaching bolts 4 which attach the splice vmembers aforesaid to an adjacent column, or to a column and next adjacent girder or girders, in the varied applications of the aforesaid connection.

In the present construction, one opposed pair of splice members will be formed to lie upon the outside o f the adjacent column or girder, while the companion pair will be formed to lay inside `an adjacent girder, as illustrated more particularly in Fig. 2, and in connection with such arrangement the present improvement' involves the use of said outer pair of splice members in the attainment of the functions of the present improvement, and to such end comprises a structural formation and arrangement of parts as follows z-5 are hook shaped eX- tensions formed upon the free ends of the outer splice members by the usual bending and upsetting operations ordinarily employed. in the metal working art. Each of said enlargements 5 projects outwardly from the main body of the splice member, and duringV the process of manufacture receives a substantially semi-circular trough formation 6, with the trough in parallel relation to the outer surface of the splice member and adapted to receive and securely hold the wire or wires 7 of an ordinary truss formation by which lateral strength and stiliness is imparted to a girder having splice connections of the present type. A suitable form of the aforesaid truss formation is shown and fully described in my prior Patent No. 919,714, dated April 27, 1909, and with which the present splice connections afford the terminal attachments for the wire tension members of said truss. S is a belly gusset formed in the girder at the point of intersection of a splice member with the body of the girder by an upsetting or swaging action upon the metal at such point. With such provision increased stiffness and strength is imparted to the splice member at and adjacent to its point of connection to the body of the girder.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent is 1. In a reinforcing frame, the combination of a column, and a tubular girder the end of which is slitted and formed into attaching splice members, the end of a splice member being formed with an extension upset into a substantially semi-circular trough form adapted to hold a terminal end of the tension Wire or Wires of a truss, substantially as set forth.

2. In a reinforcing frame, the combination of a column, and a tubular girder the end of Which is slitted and formed into attaching splice members, the end of a splice member being formed with an extension arranged at the outside of the body of the splice member and upset into a substantially semi-circular trough form adapted to hold a terminal end of the tension Wire or Wires of a truss, substantially as set forth.

3. In a reinforcing frame, the combination of a column, and a tubular girder the end of Which is slitted and formed into attaching splice members, the end of a splice member being formed With an extension upset into a substantially semi-circular trough form adapted to hold a terminal end of the tension Wire or Wires of a truss, said girder having a bellygusset formed at 'the intersection of the splice member With the body of the girder, substantially as set forth.

4c. In a reinforcing frame, the combination of a column, an a tubular girder the end of which is slitted and formed into attaching splice members, the end of a splice member being formed With an extension arranged at the outside of the body of the splice member and upset into a substantially semi-circular trough form adapted to hold a terminal end of the tension Wire or Wires of a truss', said girder having a belly gusset formed at the intersection of the splice member With the body .of the girder, substantially as set forth.

Signed at Chicago, Illinois, this 7th day of June, 1910. l

GEORGE M. GRAHAM.

Witnesses ROBERT BURNS, L. HOLDEN.

Copies of this patent may be obtained for five lcents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

